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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur
KFM 14: Postersession KFM
KFM 14.17: Poster
Mittwoch, 3. April 2019, 16:00–18:30, Poster C
Enhancing magnetoelectric coupling in 0-3 composite ceramics — •Doru C. Lupascu1, Muhammad Naveed-Ul-Haq1, Shvartsman Vladimir V.1, Salamon Soma2, Weber Samira2, Wende Heiko2, Labusch Matthias3, and Schröder Jörg3 — 1Institute for Materials Science and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg- Essen, Universitatsstraße 15, 45141 Essen, Germany — 2Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Lotharstraße 1, 47057 Duisburg, Germany — 3Institute for Mechanics, Department of Civil Engineering, University of Duisburg-Essen, Universitatsstraße 15, 45141 Essen, Germany
It is well established that the highest magnetoelectric coupling can be achieved for systems that use a mechanical resonator at or near resonance typically realized as 2-2-layered devices of a magnetostrictive phase and a piezoelectric material. Statically, the coupling must, nevertheless, not be so high, because amplitude enhancement at high mechanical quality factor can be enormous. We show that statically also 0-3 composites show considerable coupling. It is in particular advantageous to seek for a material combination that uses not necessarily large absolute magnetostriction and electrostrictive strain, but rather places the system at external fields, where the largest changes of each arise. A very significant improvement of magnetoelectric coupling was achieved when combining NiFe2O4 with a relaxor ferroelectric system based on (Ba,Ca)(Zr,Ti)O3. [1] M. Naveed-Ul-Haq, et al., Acta Materialia 144 (2018) 305 - 313